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Great thread. Have really enjoyed reading it in its entirety this evening. Thanks for the work needed to show us.
". . i think it's hurting my fuel mileage, in addition it throws off my outside temp reading especially when the engine fan turns on".
I'm glad you've changed the tire mount. Visibility also a concern. MPG is rolling resistance to 45-mph (mainly tire tread design), and then aerodynamic resistance past 60-mph (why the national limit was in the sweet spot of 55-mph after 1973).
FWIW I would leave well enough alone in re engine software and hardware. A Cummins engineer in that department has confirmed to me that the price of the exhaust emissions downstream portion of the current CTD pickup is in excess of $15k.
MPG is more about driver training, trip planning and, vehicle dependent: aero improvements and/or gear changes.
Here's a report from the oilfield on using the DODGE C&C in hotshot operations (the drilling rig calls and wants a part or tool yesterday. High pay per mile and strict timeline. Not road speed, per se, but efficient use of time, overall). The report is by one who knows what he is about (as I have also done this, and still run oilfield, but now in Class 8).
ElkyRacer: DEF Useage & IFTA Mileage Report
He's running harder, faster and heavier than you with your rig, but this is verifiable
average mpg in the Texas/Louisiana oilfield, not campfire brags.
I'd say that any changes in re mpg improvements be measured against the per-night cost of the rig (X-years of ownership/use plus annual miles over Y-nights of use). Fuel is
not the big portion of the budget versus all other costs combined.
As noted in a post above, the more stringent emissions requirements today are similar to what cars went through in the early 1970's. But the cost of screwing around with them will be far higher. Diagnosing some problems is only worsened, IMO, by changing what the factory put in place. They already have enough computer flashes that one never knows whether one is current or not. I say leave well enough alone.
That said, were you up for changes in aero, the group on
www.ecomodder.com would be willing to take a stab at it. Have a look at the changes to a Class C motorhome by
orbywan for ideas.
I own an aero aluminum TT pulled by a triple-nickle CTD and am always looking for ideas for both. Your thread is a keeper!!
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